Method of making radiators



J. A. FORAND July 6 1 926.

METHOD OF MAKING RADIATORS Filed Dec. 19 1924 I77 venfor J. A. F0 Par/7D Z anvey Patented July 6, 1926.

JOSEPH ALBERT FOBAND, OF PLESSISVILLE, QUEBEC, CANADA.

METHOD MAKING RADIATORS.

Application filed December 19, 1924. Serial No. 757,004.

The present invention relates to improvements in radiators and the method of making radiators of the type having inner and outer tubes, and the main object is to provide a most hermetic and resistant joint at the meeting ends of said tubes as well as to reduce the cost of manufacturing same.

The invention will now be fully described in the following specification and is illustrated in the accompanying drawings in whichz- Figure 1 is a vertical sectional view through a radiator section according to the invention.

Figure 2 is a cross section on line -2-2 of Fig. 1. I

Figure 3 is a longitudinal sectional view through one of the inner tubes.

Referring to the drawings, 1 is the outerwall of a radiator section, each end being open, the inner walls of which are provided with inwardly projecting circumferential flanges 2 and 3 respectively which are then suitably machined or ground, the flanges 3 located preferably in the u per end of said radiator section being of arger diameter than the flanges 2.

The inner tubes 4 are also provided at each end, on their outer side, with circumferential flanges 5" and 6 which are also suitably machined or ground respectively, theflan es 5 located ,at the upper end be ing pre erably of slightly larger diameter than the flanges 6, in order to fit snugly in corresponding flanges'3, the object being to facilitate the entry of the lower flanges 6 through the upper flanges 3.

The lower flanges 6 are preferably provided with tapered outer edges 7 so that when the tubes 4 are inserted in the outer casing 1 they will immediately be centered when they reach the lower flanges 2.

When assembling the outer casing 1 and tubes 4, the outer casing is suitably held in fixed position, and the inner tube 4 first inserted andthe lower flange 6 is suitably centered in the adjoining flange 2. Then any suitable pressure is used, such as by means of a press, to force the snugly fitting flanged ends of the inner tubes 'into the accordingly flanged inner ends of the outer casing 1. obtained.

The proper method to follow to make a radiator of this character is to first cast the outer casing and inner tubes, after which Thus a perfect hermetic joint is the inner side of the flanges 2 and 3 are through first, the flange 2 and then the flange 3 when the flanges 5 and 6 on said inner tube are centered in said flanges 2 and 3, and a suitable pressure is used, such as by means of a press to force the snugly fitting flanges into one another.

The diameter of the flanges 5 and 6 should be of approximately 1 to 6 thousanth of an inch larger than that of the flanges 2 and 3, thus I insuring a perfect hermetic joint.

What I claim as my invention is:

1. In a radiator construction of the type having an outer casing provided with aligned openings and a tube extending throu h the .casin and secured at its ends in sai openings, t tube in the casing which comprises providing an inwardly directed flange on the casing surrounding one of said openings, suitably machining the inner surface of said flange to a predetermined inner diame method of securing the eter, providing a second flange surrounding the other opening in said casing and suitably 'machining the inner surface of the same to a predetermined inner diameter smaller than the predetermined inner diam-' eter of said first named flange, providing an outwardly directed flange on one end of said tube and machining the same to a diameter which will enable the same to be inserted through the first named opening in said casing and to a diameter slightly larger than the predetermined diameter of the aforenamed second flange, providing an outwardly directed flange on the other end of said tube and machining the same to a diamsaid first name flange on the casing,

eter slightly lar er than the diameter of whereby the tube may be inserted in said casing and its flanges brought into engagement with the corresponding flan on said casing, and forcibly prming sai tube into I the casin to bring the flanges of the tube and the anges of the casing into close contact. 7

2. A method as specified in claim 1, which includes forming a. taper on the inserted end of said tube, whereby the tube 19 is centered in said second named flange.

Signed at Plessisville this 8th day of November, 1924.

JOSEPH ALBERT FORAND. 

